Flexible insulated air duct and modular flexible insulated air-duct system

ABSTRACT

Provided are a flexible insulated air duct and a modular flexible insulated air-duct system; the flexible insulated air duct includes an air-duct main body (1); the air-duct main body (1) includes an inner air-duct layer (5) and a heat-insulating layer (4) integrally formed on the inner air-duct layer (5); the inner air-duct layer (5) is arranged inside the heat-insulating layer (4), and the heat-insulating layer (4) is a rubber/plastic material. The modular flexible insulated air-duct system made by assembling a main air duct (7), a branched air duct (8), and a connecting air duct (9) may be rapidly connected on-site using a zip fastener to form an air-duct system having any configuration.

TECHNICAL FIELD

The invention refers to the field of air-conditioning ventilation duct,in particular to a flexible insulation duct and a modular flexibleinsulation duct system.

BACKGROUND ART

The insulation duct is mostly used in cold and warm air conditioningengineering. According to the materials, the insulation duct comprises airon sheet duct, a glass steel duct, a polyurethane duct, a phenolicduct, a polystyrene duct, a fiberglass duct, etc., most of which arerigid ducts, or the composite duct coated with aluminum foil on bothsides of the insulation is material layer, which has poor insulationeffect and fire resistance, with easy air leakage, difficult assemblingconnection and replacement. The soft tube made of rubber or plasticalone cannot be used as a duct, which is easy to break, and cannot beassembled or hoisted.

In practical use, the structure of ducts varies with differentapplication sites. Currently, different specifications of ducts areusually customized according to the actual situation of applicationsites.

However, the customized duct specifications are not uniform, and theyare all non-standard parts, which cannot be prefabricated in advance.Production can only be carried out after the site size is measured andapplied, which is not only large in manufacturing cost, but alsoinconvenient for packaging and transportation. In the installation anduse, the installation must be carried out in accordance with thepre-arranged order, and the flexibility is poor. If there is any sitemeasurement error before, it will cause a lot of losses.

SUMMARY

In view of the defects existing in the prior art, the invention is aimedat providing a flexible insulation duct and a modular flexibleinsulation duct system, with good insulation effect and fire resistanceperformance.

In the first aspect, the embodiment of the invention provides a flexibleinsulation duct, comprising a duct main body, which is an annular pipe,wherein the duct main body comprises an inner duct layer and aninsulation layer integrally formed on the inner duct layer; the innerduct layer is provided in the insulation layer, and the insulation layeris made of rubber plastic materials.

Based on the first aspect, in a possible embodiment, the outer layer ofthe insulation layer is provided with an outer insulation layer.

Based on the first aspect, in a possible embodiment, two ends of theduct main body are respectively provided with a first zipper tapeconnected with other flexible insulation ducts or duct connectors.

Based on the first aspect, in a possible embodiment, the first zippertape on one end of the duct main body is provided with a first zipperhead.

Based on the first aspect, in a possible embodiment, the duct main bodyis provided with a second zipper for opening or closing the duct mainbody, the second zipper is longitudinally arranged along the duct mainbody; when the second zipper is closed, the duct main body is annular;when the second zipper is opened, the duct main body is tabular. Whenthe flexible insulation duct is tabular, it can be overlapped in thecontainer, with convenient packaging and transportation.

In the second aspect, the embodiment of the invention provides a modularflexible insulation duct system, comprising:

a main duct, one end of which is provided with an air inlet, and themain duct comprises multiple flexible insulation ducts based on thefirst aspect;

a branch duct extending from the lateral direction of the main duct, thebranch duct comprises at least one flexible insulation duct and isconnected with the main duct through a connecting duct, and

the connecting duct is provided with at least one zipper group, theposition of the zipper group is so configured that when all zippers inthe zipper group are opened, the connecting duct is divided intomultiple flaky pieces.

Based on the second aspect, in a possible embodiment, the connectingduct is a steering duct, a tee duct, a four-way duct, a variablediameter duct, an inlet duct or an outlet duct, which can be connectedwith the main duct and the branch duct to form an arbitrary structure ofthe duct system.

Based on the second aspect, in a possible embodiment, the connectingduct is a steering duct, the steering duct is provided with a firstconnecting pipe, a second connecting pipe and a third connecting pipesuccessively connected; there is an included angle between the axialdirection of the first connecting pipe and the axial direction of thethird connecting pipe, the first connecting pipe is connected to themain duct and the third connecting pipe is connected to the branch duct,and the zipper group comprises:

a first zipper group axially arranged along the first connecting pipe,the second connecting pipe and the third connecting pipe; and

a second zipper group circumferentially arranged along two ends of thefirst connecting pipe, the second connecting pipe and the thirdconnecting pipe.

Based on the second aspect, in a possible embodiment, the connectingduct is a tee duct, the tee duct is composed of a third connecting pipeand a fourth connecting pipe, a through hole for connecting the fourthconnecting pipe is provided in the middle of the third connecting pipe,and the zipper group comprises:

a third zipper group axially arranged along the third connecting pipeand the fourth connecting pipe; and

a fourth zipper group circumferentially arranged along the through holeand two ends of the third connecting pipe and the fourth connectingpipe.

Based on the second aspect, in a possible embodiment, one interface ofthe tee duct is connected with the main duct, and other two interfacesare respectively connected with a branch duct.

Based on the second aspect, in a possible embodiment, the connectingduct is a four-way duct, the four-way duct is composed of a fifthconnecting pipe, a sixth connecting pipe and a seventh connecting pipe,the fifth connecting pipe is symmetrically provided with two throughholes, the sixth connecting pipe and the seventh connecting pipe arerespectively connected with a through hole, and the zipper groupcomprises:

a fifth zipper group axially arranged along the fifth connecting pipe,the sixth connecting pipe and the seventh connecting pipe; and

a sixth zipper group circumferentially arranged along the through holeand two ends of the fifth connecting pipe, the sixth connecting pipe andthe seventh connecting pipe.

Based on the second aspect, in a possible embodiment, two oppositeinterfaces of the four-way duct are respectively connected with a mainduct, and other two opposite interfaces are respectively connected witha branch duct.

Based on the second aspect, in a possible embodiment, the main ductcomprises:

a first section close to the air inlet of the main duct, and the firstsection comprises multiple first flexible insulation ducts; and

a second section away from the air inlet of the main duct, and thesecond section comprises multiple second flexible insulation ducts; and

the diameter of the first flexible insulation duct is greater than thatof the is second flexible insulation duct.

Based on the second aspect, in a possible embodiment, a first four-wayduct is connected at the air inlet of the main duct, the first sectionis connected with the second section through a variable diameter module,and the variable diameter module comprises a second four-way duct and avariable diameter duct connected with each other;

the tail end of the main duct is connected with a tee duct;

the tee duct is composed of a third connecting pipe and a fourthconnecting pipe, a through hole for connecting the fourth connectingpipe is provided in the middle of the third connecting pipe, and thezipper group comprises:

a third zipper group axially arranged along the third connecting pipeand the fourth connecting pipe; a fourth zipper group circumferentiallyarranged along the through hole and two ends of the third connectingpipe and the fourth connecting pipe;

the tee duct is also connected with two branch ducts extending inreverse direction; and

both the first four-way duct and the second four-way duct are connectedwith two branch ducts.

Based on the second aspect, in a possible embodiment, the tail end ofthe branch duct connected with the first four-way duct or the secondfour-way duct is also provided with a tee duct, and two sub-branch ductsextending in reverse direction are also connected to the tee duct.

In the third aspect, the embodiment of the invention provides a flexibleinsulation duct, comprising a duct main body, wherein two ends of theduct main body are respectively provided with a connecting piece indetachable connection with the flexible air supply duct, and the ductmain body is provided with an opening and closing mechanism for openingand closing the duct main body;

the duct main body comprises an insulation layer, an inner duct layer isprovided on the top of the insulation layer, and an outer insulationlayer is provided on the bottom of the insulation layer.

Based on the third aspect, in a possible embodiment, the insulationlayer is made of rubber plastic materials.

Based on the third aspect, in a possible embodiment, the opening andclosing mechanism is a second zipper, and the second zipper islongitudinally arranged along the duct main body; when the second zipperis closed, the duct main body is annular; when the second zipper isopened, the duct main body is tabular.

Based on the third aspect, in a possible embodiment, the duct main bodyis provided with a joint extending along the length direction anddivided into a first end and a second end through the joint, at leastone of the inner surface and the outer surface of the duct main body isprovided with a second zipper arranged along the joint, the secondzipper is connected with the first end and the second end, and the firstend and the second end are extruded with each other at the joint, sothat two sides of the joint fit more tightly, and there will be no airleakage.

Based on the third aspect, in a possible embodiment, both the innersurface and outer surface of the duct main body are respectivelyprovided with the second zipper arranged along the joint.

Based on the third aspect, in a possible embodiment, the second zippercomprises a male chain provided at the first end and a female chainprovided at the second end, the male chain defines a first installationpoint on the first end, and the female chain defines a secondinstallation point on the second end; a first distance A is formedbetween the first installation point and the second installation pointunder the closing state of the second zipper;

a second distance B is formed between the first installation point andthe tail end of the first end under the opening state of the secondzipper; a third distance C is formed between the second installationpoint and the tail end of the second end, wherein

the first distance A is slightly less than the sum of the seconddistance B and the third distance C.

In the fourth aspect, the embodiment of the invention provides a modularflexible insulation duct system, comprising:

a main duct, one end of which is provided with an air inlet, and themain duct comprises multiple flexible insulation ducts based on thethird aspect;

a branch duct extending from the lateral direction of the main duct, thebranch duct comprises at least one flexible insulation duct and isconnected with the main duct through a connecting duct, and

the connecting duct is provided with at least one zipper group, theposition of the zipper group is so configured that when all zippers inthe zipper group are opened, the connecting duct is divided intomultiple flaky pieces, with quick on-site installation.

Based on the fourth aspect, in a possible embodiment, the connectingduct is a steering duct, a tee duct, a four-way duct, a variablediameter duct, an inlet duct or an outlet duct, which can be connectedwith the main duct and the branch duct to form an arbitrary structure ofthe duct system.

Based on the fourth aspect, in a possible embodiment, the connectingduct is a steering duct, the steering duct is provided with a firstconnecting pipe, a second connecting pipe and a third connecting pipesuccessively connected;

there is an included angle between the axial direction of the firstconnecting pipe and the axial direction of the third connecting pipe,the first connecting pipe is connected to the main duct and the thirdconnecting pipe is connected to the branch duct, and the zipper groupcomprises:

a first zipper group axially arranged along the first connecting pipe,the second connecting pipe and the third connecting pipe; and

a second zipper group circumferentially arranged along two ends of thefirst connecting pipe, the second connecting pipe and the thirdconnecting pipe.

Based on the fourth aspect, in a possible embodiment, the connectingduct is a tee duct, the tee duct is composed of a third connecting pipeand a fourth connecting pipe, a through hole for connecting the fourthconnecting pipe is provided in the middle of the third connecting pipe,and the zipper group comprises:

a third zipper group axially arranged along the third connecting pipeand the fourth connecting pipe; and

a fourth zipper group circumferentially arranged along the through holeand two ends of the third connecting pipe and the fourth connectingpipe.

Based on the fourth aspect, in a possible embodiment, one interface ofthe tee duct is connected with the main duct, and other two interfacesare respectively connected with a branch duct.

Based on the fourth aspect, in a possible embodiment, the connectingduct is a four-way duct, the four-way duct is composed of a fifthconnecting pipe, a sixth connecting pipe and a seventh connecting pipe,the fifth connecting pipe is symmetrically provided with two throughholes, the sixth connecting pipe and the seventh connecting pipe arerespectively connected with a through hole, and the zipper groupcomprises:

a fifth zipper group axially arranged along the fifth connecting pipe,the sixth connecting pipe and the seventh connecting pipe; and

a sixth zipper group circumferentially arranged along the through holeand two ends of the fifth connecting pipe, the sixth connecting pipe andthe seventh connecting pipe.

Based on the fourth aspect, in a possible embodiment, two oppositeinterfaces of the four-way duct are respectively connected with a mainduct, and other two opposite interfaces are respectively connected witha branch duct.

In the embodiment of the invention, the main duct comprises:

a first section near the air inlet of the main duct, and the firstsection comprises multiple first flexible insulation ducts;

a second section away from the air inlet of the main duct, and thesecond section comprises multiple second flexible insulation ducts; and

the diameter of the first flexible insulation duct is greater than thatof the second flexible insulation duct.

Based on the fourth aspect, in a possible embodiment, a first four-wayduct is connected at the air inlet of the main duct, the first sectionis connected with the second section through a variable diameter module,and the variable diameter module comprises a second four-way duct and avariable diameter duct connected with each other;

the tail end of the main duct is connected with a tee duct;

the tee duct is composed of a third connecting pipe and a fourthconnecting pipe, a through hole for connecting the fourth connectingpipe is provided in the middle of the third connecting pipe, and thezipper group comprises:

a third zipper group axially arranged along the third connecting pipeand the fourth connecting pipe; and

a fourth zipper group circumferentially arranged along the through holeand two ends of the third connecting pipe and the fourth connectingpipe;

the tee duct is also connected with two branch ducts extending inreverse direction; and

both the first four-way duct and the second four-way duct are connectedwith two branch ducts.

Based on the fourth aspect, in a possible embodiment, the tail end ofthe branch duct connected with the first four-way duct or the secondfour-way duct is also provided with a tee duct, and two sub-branch ductsextending in reverse direction are also connected to the tee duct.

Compared with the prior art, the invention has the advantages asfollows:

The invention provides a flexible insulation duct, which is composed ofan inner duct layer and an insulation layer by integrating. Comparedwith traditional duct, it has better heat preservation performance, fireresistance and air leakage prevention performance. When the flexibleinsulation duct is tabular, it can be overlapped in the pallet containerand other equipment, with convenient packaging and transportation. Themodular flexible insulation duct system assembled from the main duct,the branch duct and the connecting duct can be quickly connected withzipper in the field to become any structure of the duct system, withfast site assembly and disassembly, saving construction time andreducing construction cost, and it has a very broad applicationprospect.

DESCRIPTION OF DRAWINGS

FIG. 1 shows a schematic diagram of the flexible insulation duct inEmbodiment 1 of the invention;

FIG. 2 shows a schematic diagram of the unfolding duct main body inEmbodiment 1 of the invention;

FIG. 3 shows a schematic diagram of the modular flexible insulation ductsystem in Embodiment 1 of the invention;

FIG. 4 shows a schematic diagram of the steering duct in Embodiment 2 ofthe invention;

FIG. 5 shows a schematic diagram of the modular flexible insulation ductsystem in Embodiment 3 of the invention;

FIG. 6 shows a schematic diagram of the flexible insulation duct inEmbodiment 4 of the invention;

FIG. 7 shows a section diagram of the flexible insulation duct inEmbodiment 4 of the invention;

FIG. 8 shows a schematic diagram of the modular flexible insulation ductsystem in Embodiment 6 of the invention;

FIG. 9 shows a schematic diagram of the tee duct in Embodiment 6 of theinvention;

FIG. 10 shows a schematic diagram of the modular flexible insulationduct system in Embodiment 7 of the invention;

FIG. 11 shows a schematic diagram of the modular flexible insulationduct system in Embodiment 8 of the invention;

FIG. 12 shows a schematic diagram of breakdown of the modular flexibleinsulation duct system in Embodiment 8 of the invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

A more detailed description is given below combined with the figures andembodiments.

Embodiment 1

The embodiment of the invention provides a modular flexible insulationduct system, as shown in FIG. 3 , which comprises the main duct 7, abranch duct 8 extending laterally from the main duct 7, and a connectingduct 9. One end of the main duct 7 is provided with an air inlet 70, andthe main duct 7 comprises multiple flexible insulation ducts, the branchduct 8 comprises at least one flexible insulation duct and is connectedwith the main duct 7 through a connecting duct 9, meanwhile theconnecting duct 9 is provided with at least one zipper group, theposition of the zipper group is so configured that when all zippers inthe zipper group are opened, the connecting duct 9 is divided intomultiple flaky pieces for rapid assembling. The main duct 7, the branchduct 8 and the connecting duct 9 can be decomposed into a variety ofmodular standard sizes for large-scale batch production.

As shown in FIG. 1 , the flexible insulation duct comprises a duct mainbody 1, which is an annular pipe, wherein the duct main body 1 comprisesan inner duct layer 5 and an insulation layer 4 integrally formed on theinner duct layer 5; the inner duct layer 5 is provided in the insulationlayer 4, and the insulation layer 4 is made of rubber plastic materials.The insulation layer 4 is integrated onto the inner duct layer 5 to formthe annular duct main body 1, so that the duct main body 1 has both thefire resistance of the inner duct layer 5 and the insulation effect ofthe insulation layer 4.

In order to further strengthen the insulation and damage prevention ofthe duct main body, the outer layer of the insulation layer 4 isprovided with an outer insulation layer 6.

As shown in FIG. 2 , two ends of the duct main body 1 are respectivelyprovided with a first zipper tape 20 connected with other flexibleinsulation ducts or duct connectors. The first zipper tape 20 on one endof the duct main body 1 is provided with a first zipper head, so thattwo ends of the duct main body 1 are connected with other flexibleinsulation ducts or duct connectors. The duct main body 1 is providedwith a second zipper 30 for opening or closing the duct main body 1, thesecond zipper 30 is longitudinally arranged along the duct main body 1;when the second zipper 30 is closed, the duct main body 1 is annular;when the second zipper 30 is opened, the duct main body 1 is tabular.During the transportation, it just needs to open the second zipper 30 toform a tabular duct main body, and then it can be overlapped in thepallet container and other equipment, with convenient packaging andtransportation.

Embodiment 2

The embodiment of the invention provides a modular flexible insulationduct system. The difference is that the connecting duct 9 in theembodiment of the invention is a steering duct 91, as shown in FIG. 4 ,the steering duct 91 is provided with a first connecting pipe 911, asecond connecting pipe 912 and a third connecting pipe 913 successivelyconnected; there is an included angle between the axial direction of thefirst connecting pipe 911 and the axial direction of the thirdconnecting pipe 913, the first connecting pipe 911 is connected to themain duct 7 and the third connecting pipe 913 is connected to the branchduct 8, and the zipper group comprises a first zipper group 914 and asecond zipper group 915, the first zipper group 914 is axially arrangedalong the first connecting pipe 911, the second connecting pipe 912 andthe third connecting pipe 913; and the second zipper group 915 iscircumferentially arranged along two ends of the first connecting pipe911, the second connecting pipe 912 and the third connecting pipe 913.

According to different application environments of flexible duct system,the air outlet mode of flexible insulation duct is also different. Adownward ventilation vent can be provided in the duct main body 1, or aventilation hole can be provided on the duct main body 1.

Embodiment 3

As shown in FIG. 5 , the embodiment of the invention provides a modularflexible insulation duct system. The difference from the Embodiment 2 isthat the connecting duct 9 is a four-way duct 93, the four-way duct 93is composed of a fifth connecting pipe, a sixth connecting pipe and aseventh connecting pipe, the fifth connecting pipe is symmetricallyprovided with two through holes, the sixth connecting pipe and theseventh connecting pipe are respectively connected with a through hole,and the zipper group comprises a fifth zipper group and a sixth zippergroup, the fifth zipper group is axially arranged along the fifthconnecting pipe, the sixth connecting pipe and the seventh connectingpipe; and the sixth zipper group is circumferentially arranged along thethrough hole and two ends of the fifth connecting pipe, the sixthconnecting pipe and the seventh connecting pipe.

Two opposite interfaces of the four-way duct 93 are respectivelyconnected with a main duct 7, and other two opposite interfaces arerespectively connected with a branch duct 8.

Embodiment 4

The embodiment of the invention provides a modular flexible insulationduct system, which comprises the main duct 7, a branch duct 8 extendinglaterally from the main duct 7, and a connecting duct 9. One end of themain duct 7 is provided with an air inlet 70, and the main duct 7comprises multiple flexible insulation ducts, the branch duct 8comprises at least one flexible insulation duct and is connected withthe main duct 7 through a connecting duct 9, meanwhile the connectingduct 9 is provided with at least one zipper group, the position of thezipper group is so configured that when all zippers in the zipper groupare opened, the connecting duct 9 is divided into multiple flaky piecesfor rapid assembling. The main duct 7, the branch duct 8 and theconnecting duct 9 can be decomposed into a variety of modular standardsizes for large-scale batch production.

In order not to be restricted by the space of the project site andreduce the customization of various length specifications, flexibleinsulation duct with the same diameter are provided with various lengthspecifications, which can be spliced into pipes of any length. When theassembled main duct 7 or branch duct 8 has size deviation, flexibleinsulation duct can also be rapidly added or reduced to adjust thelength of main duct 7 or branch duct 8 to accurately meet the actualsize of the site, so as to ensure that the main air duct 7 or the branchair duct 8 is in straight state during air supply, and avoid the sag ofthe main duct 7 or branch duct 8, which will affect the effect andaesthetics of air supply.

The connecting duct 9 is a steering duct 91, a tee duct 92, a four-wayduct 93, a variable diameter duct 94, an inlet duct or an outlet duct,and it can be customized according to the actual needs of the site, andcan be quickly assembled into any structure of the pipe.

As shown in FIG. 6 , the flexible insulation duct comprises a duct mainbody 1, wherein two ends of the duct main body 1 are respectivelyprovided with a connecting piece 2 in detachable connection with theflexible air supply duct, and the duct main body 1 is provided with anopening and closing mechanism 3 for opening and closing the duct mainbody 1.

In the embodiment, the opening and closing mechanism 3 is a secondzipper 30, and the second zipper 30 is longitudinally arranged along theduct main body 1; when the second zipper 30 is closed, the duct mainbody 1 is annular; when the second zipper 30 is opened, the duct mainbody 1 is tabular, and it can be overlapped in the container, withconvenient packaging and transportation.

the duct main body 1 is provided with a joint extending along the lengthdirection and divided into a first end 10 and a second end 11 throughthe joint, at least one of the inner surface and the outer surface ofthe duct main body 1 is provided with a second zipper 30 arranged alongthe joint, the second zipper 30 is connected with the first end 10 andthe second end 11, and the first end 10 and the second end 11 areextruded with each other at the joint. Due to the effect of extrudingwith each other at the joint, both sides of the joint fit more tightly,which solves the problem of air leakage of the duct main body 1 at thejoint, reduces the load of the fan, and ensures the service life of ductmain body 1.

As shown in FIG. 7 , both the inner surface and outer surface of theduct main body 1 are respectively provided with the second zipper 30arranged along the joint. The second zipper 30 comprises a male chainprovided at the first end 10 and a female chain provided at the secondend 11, the male chain defines a first installation point 13 on thefirst end 10, and the female chain defines a second installation point14 on the second end 11; a first distance A is formed between the firstinstallation point 13 and the second installation point 14 under theclosing state of the second zipper 30; a second distance B formedbetween the first installation point 13 and the tail end of the firstend 10 under the opening state of the second zipper 30; a third distanceC is formed between the second installation point 14 and the tail end ofthe second end 11, wherein the first distance A is slightly smaller thanthe sum of the second distance B and the third distance C. However, thesecond distance B and the third distance C are not limited, but it ispreferred that the second distance B is equal to the third distance C;here, the first distance A is slightly smaller, it means to make thefirst end 10 and the second end 11 extruded with each other, but it willnot be too small to make the zipper unable to close.

As shown in FIG. 1 , the duct main body 1 comprises an insulation layer4, an inner duct layer 5 is provided on the top of the insulation layer4, and an outer insulation layer 6 is provided on the bottom of theinsulation layer 4. In addition to overlaying the duct main body 1 inthe container, it can also be folded longitudinally from the connectorat one end of the duct main body 1. The duct main body 1 has no gapsleft in each circle during folding, and the volume is small afterfolding, which is convenient for transportation and storage. Inaddition, after folding, the inner duct layer 5 and outer insulationlayer 6 have no folds and will not be separated from the insulationlayer 4, wherein the insulation layer 4 is made of rubber plasticmaterials.

Embodiment 5

The embodiment of the invention provides a modular flexible insulationduct system, as shown in FIG. 3 and FIG. 4 . The difference is that theconnecting duct 9 in the embodiment of the invention is a steering duct91, the steering duct 91 is provided with a first connecting pipe 911, asecond connecting pipe 912 and a third connecting pipe 913 successivelyconnected; there is an included angle between the axial direction of thefirst connecting pipe 911 and the axial direction of the thirdconnecting pipe 913, the first connecting pipe 911 is connected to themain duct 7 and the third connecting pipe 913 is connected to the branchduct 8, and the zipper group comprises a first zipper group 914 and asecond zipper group 915, the first zipper group 914 is axially arrangedalong the first connecting pipe 911, the second connecting pipe 912 andthe third connecting pipe 913; and the second zipper group 915 iscircumferentially arranged along two ends of the first connecting pipe911, the second connecting pipe 912 and the third connecting pipe 913.

Embodiment 6

As shown in FIG. 8 and FIG. 9 , the embodiment of the invention providesa modular flexible insulation duct system. The difference from theEmbodiment 5 is that the connecting duct 9 is a tee duct 92, the teeduct 92 is composed of a third connecting pipe 921 and a fourthconnecting pipe 922, a through hole for connecting the fourth connectingpipe 922 is provided in the middle of the third connecting pipe 921, andthe zipper group comprises a third zipper group 924 and a fourth zippergroup 925, the third zipper group 924 is axially arranged along thethird connecting pipe 921 and the fourth connecting pipe 922; and thefourth zipper group 925 is circumferentially arranged along the throughhole and two ends of the third connecting pipe 921 and the fourthconnecting pipe 922. In the embodiment, one interface of the tee duct 92is connected with the main duct 7, and other two interfaces arerespectively connected with a branch duct 8.

Embodiment 7

As shown in FIG. 10 , the embodiment of the invention provides a modularflexible insulation duct system. The difference from the Embodiment 5 orEmbodiment 6 is that the connecting duct 9 is a four-way duct 93, thefour-way duct 93 is composed of a fifth connecting pipe, a sixthconnecting pipe and a seventh connecting pipe, the fifth connecting pipeis symmetrically provided with two through holes, the sixth connectingpipe and the seventh connecting pipe are respectively connected with athrough hole, and the zipper group comprises a fifth zipper group and asixth zipper group, the fifth zipper group is axially arranged along thefifth connecting pipe, the sixth connecting pipe and the seventhconnecting pipe; and the sixth zipper group is circumferentiallyarranged along the through hole and two ends of the fifth connectingpipe, the six connecting pipe and the seventh connecting pipe.

In the embodiment, the main duct 7 comprises a first section 71 near theair inlet of the main duct 7 and a second section 72 away from the airinlet of the main duct 7, wherein the first section 71 comprisesmultiple first flexible insulation ducts, and the second section 72comprises multiple second flexible insulation ducts; meanwhile thediameter of the first flexible insulation duct is greater than that ofthe second flexible insulation duct to adapt to the change of windpressure. According to the actual requirements on the site, multiplefirst flexible insulation ducts can be spliced into the first section 71with the required length, and multiple second flexible insulation ductscan be spliced into the second segment 72 with the required length.

A first four-way duct 931 is connected at the air inlet of the main duct7, the first section 71 is connected with the second section 72 througha variable diameter module, and the variable diameter module comprises asecond four-way duct 932 and a variable diameter duct 94 connected witheach other. A large-diameter end of the variable diameter duct 94 isconnected with the second four-way duct 932, and a small-diameter endthereof is connected with the second section 72.

The tail end of the main duct 7 is connected with a tee duct 92. Asshown in FIG. 9 , the tee duct 92 is composed of a third connecting pipe921 and a fourth connecting pipe 922, a through hole for connecting thefourth connecting pipe 922 is provided in the middle of the thirdconnecting pipe 921, and the zipper group comprises a third zipper group924 and a fourth zipper group 925, the third zipper group 924 is axiallyarranged along the third connecting pipe 921 and the fourth connectingpipe 922; and the fourth zipper group 925 is circumferentially arrangedalong the through hole and two ends of the third connecting pipe 921 andthe fourth connecting pipe 922.

In the embodiment, the tee duct 92 is also connected with two branchducts (8) extending in reverse direction, and both the first four-wayduct 931 and the second four-way duct 932 are connected with two branchducts 8. The tail end of the branch duct 8 connected with the secondfour-way duct 932 is also provided with a tee duct 92, and twosub-branch ducts 80 extending in reverse direction are also connected tothe tee duct 92.

Embodiment 8

As shown in FIG. 11 and FIG. 12 , the embodiment of the inventionprovides a modular flexible insulation duct system. The difference fromthe Embodiment 7 is that both tail ends of the branch duct 8 connectedwith the first four-way duct 931 and the branch duct 8 connected withthe second four-way duct 932 are provided with a tee duct 92, and twosub-branch ducts 80 extending in reverse direction are also connected tothe tee duct 92.

In the use of the modular flexible duct insulation system in theembodiment, according to the actual situation of the application site,flexible insulation duct can be produced in advance in the factory, andthe parts to be assembled will be numbered in order, which is convenientfor construction personnel to realize direct modular and rapidassembling according to the number on site, so as to greatly improve theengineering efficiency and shorten the construction period.

The invention is not limited to the best embodiments mentioned above.Any person may derive other forms of products from the inspiration ofthe invention, but any technical solution identical or similar to theinvention, regardless of any change in its shape or structure, shall bewithin its protection scope.

The invention claimed is:
 1. A modular flexible insulation duct system,comprising: a main duct (7), one end of which is provided with an airinlet (70), and the main duct (7) comprising multiple flexibleinsulation ducts, each flexible insulation duct comprising a duct mainbody (1) which is an annular pipe, wherein the duct main body (1)comprises an inner duct layer (5) and an insulation layer (4) integrallyformed on the inner duct layer (5), the inner duct layer (5) is providedin the insulation layer (4), and the insulation layer (4) is made ofrubber plastic materials; a branch duct (8) extending from the lateraldirection of the main duct (7), the branch duct (8) comprises at leastone flexible insulation duct and is connected with the main duct (7)through a connecting duct (9), and the connecting duct (9) is providedwith at least one zipper group, the position of the zipper group is soconfigured that when all zippers in the zipper group are opened, theconnecting duct (9) is divided into multiple flaky pieces.
 2. Theflexible insulation duct according to claim 1, wherein an outer layer ofthe insulation layer (4) is provided with an outer insulation layer (6).3. The flexible insulation duct according to claim 1, wherein the ductmain body (1) is provided with a zipper (30) for opening or closing theduct main body (1), the zipper (30) is longitudinally arranged along theduct main body (1); when the zipper (30) is closed, the duct main body(1) is annular; when the zipper (30) is opened, the duct main body (1)is tabular.